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WO2018199934A1 - Lampe et commande de triac - Google Patents

Lampe et commande de triac Download PDF

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Publication number
WO2018199934A1
WO2018199934A1 PCT/US2017/029432 US2017029432W WO2018199934A1 WO 2018199934 A1 WO2018199934 A1 WO 2018199934A1 US 2017029432 W US2017029432 W US 2017029432W WO 2018199934 A1 WO2018199934 A1 WO 2018199934A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
cycle
triac
power level
turn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2017/029432
Other languages
English (en)
Inventor
David SORIANO FOSAS
Marina Ferran Farres
Anna TORRENT PUIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Priority to PCT/US2017/029432 priority Critical patent/WO2018199934A1/fr
Publication of WO2018199934A1 publication Critical patent/WO2018199934A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/041—Controlling the light-intensity of the source
    • H05B39/044—Controlling the light-intensity of the source continuously
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • Lamps convert electrical energy into light energy and/or heat energy.
  • additive manufacturing is a popular technique for fabricating three-dimensional (3D) objects from a build material in a layer-by-layer manner.
  • Some additive manufacturing systems use one or more lamps to selectively provide heat energy to a portion of a layer of build material for the 3D object being fabricated. Precise temperature control of the build material during the fabrication process helps ensure that the 3D object is of high quality, and to achieve an intended temperature level a lamp may be controlled to operate at a particular power level.
  • Some lamps, such as for example incandescent lamps have a resistance which changes with temperature. This characteristic can make it difficult to precisely control the power level at which the lamp is operated.
  • FIG. 1 is a schematic representation of an additive manufacturing system in accordance with an example of the present disclosure.
  • FIG. 2 is a schematic representation of a heating lamp array usable with the additive manufacturing system of FIG. 1 in accordance with an example of the present disclosure.
  • FIG. 3 is a schematic representation of a lamp control system usable with the heating lamp array of FIG. 2 and the additive manufacturing system of FIG. 1 in accordance with an example of the present disclosure.
  • FIG. 4 is a more detailed electrical schematic representation of a portion of the lamp control system of FIG. 3 for a single one of the lamps in accordance with an example of the present disclosure.
  • FIG. 5 is a schematic timing diagram of one cycle of an example AC waveform provided to the lamp control system of FIG. 4 in accordance with an example of the present disclosure.
  • FIG. 6 is a flowchart in accordance with an example of the present disclosure of a method of operating a Triac-controlled lamp at a specified power level.
  • FIG. 7 is another flowchart in accordance with an example of the present disclosure of a method of operating a Triac-controlled lamp at a specified power level.
  • FIG. 8 is a schematic representation of a lamp controller usable with the lamp control system of FIG. 3 and the additive manufacturing system of FIG. 1 in accordance with an example of the present disclosure.
  • Some AM systems utilize tungsten, or tungsten-halogen, lamps. These lamps generate light having an adequate wavelength in the infrared (IR) region to serve as a heat source for an AM system, and have a sufficiently fast heat output response to changes in the power level applied to the lamp to allow the temperature within the AM system to be maintained within allowable limits of a desired temperature.
  • IR infrared
  • These lamps have a filament through which current flows.
  • the temperature of the filament increases with increasing current flow.
  • the resistance of the lamp also increases with the temperature of the filament. In some examples, the temperature increases monotonically, but not necessarily linearly, with temperature.
  • the resistance of a hot lamp operating at its rated power i.e. at its full rated voltage and current
  • the resistance of a hot lamp operating at its rated power is about 15 times greater than the resistance of a cold lamp, due to the difference in filament temperature.
  • the lamp draws a high inrush current for a very short period of time, as the filament quickly heats to its hot temperature.
  • the rated life of the lamp is based on drawing such high currents for short periods of time; operation of the lamp at higher-than-rated current levels for extended periods of time can undesirably reduce the life of the lamp.
  • the desired power level may be 20% of the rated power.
  • the filament temperature is significantly cooler, and thus the resistance of the lamp is significantly lower than its rated resistance.
  • a 20% power level were to be implemented by a 20% duty cycle (i.e. by applying the rated voltage to the lamp 20% of the time), high peak currents would occur due to the lower lamp resistance, adversely affecting the reliability and lifetime of the lamp.
  • an additive manufacturing system 100 includes a build chamber 1 10 in which at least one 3D object can be fabricated on a build platform 1 15.
  • the build platform 1 15 is substantially planar in the X-Y plane (the Y direction is into and out of the page). In one example, the build platform 1 15 is 12 by 12 inches.
  • the 3D object is fabricated according to a 3D digital representation (or "model") which is divided ("sliced") into a series of thin, adjacent parallel planar slices, and the 3D object is then fabricated layer- by-layer with each slice of the representation generally corresponding to a layer of the physical object to be fabricated.
  • the first layer is formed on the build platform 1 15, and then each next layer is formed on top of the adjacent previous layer(s). In one example, each layer is about 0.1 millimeter in thickness.
  • one type of additive manufacturing selectively deposits a fusing agent onto build material, and a heat source then fuses the build material at the locations at which the fusing agent has been deposited.
  • the build material is a light color particulate material or powder, which may be white.
  • the build material is polyamide (nylon).
  • Other build materials may be powders of one or more different materials.
  • the powder particles range from 5 to 200 microns in size. In one example, the powder particles may have an average size of 50 microns.
  • a print engine controllably ejects drops of a liquid fusing agent onto the regions of build material which correspond generally to the location of the 3D object's cross-section within the
  • the print engine uses inkjet printing technology.
  • the fusing agent is a dark colored liquid such as for example black pigmented printing liquid, an IR absorbent liquid or printing liquid, and/or other liquid(s).
  • the heat source then traverses the entire print zone.
  • the regions of the powder onto which the fusing agent has been deposited absorbs sufficient radiated heat energy from the heat source to melt the powder in those regions, fusing that powder together and to fused powder in the previous layer underneath.
  • regions of the powder onto which fusing agent has not been deposited do not absorb sufficient radiated heat energy to melt the powder.
  • those portions of the layer on which no fusing agent was deposited remain in unfused powdered form.
  • FIG. 1 illustrates the system 100 during an intermediate operation of the fabrication process for the 3D object, where an intermediate layer is being fabricated.
  • a layer 130 of unfused build material has been deposited on top of previous layers 132 in which portions of the build material for the 3D object have already been fused.
  • a volume defined by the dimensions of the build platform 1 15 in the X and Y directions and the span in the Z direction of the layers 130, 132 constitutes a build bed 120 that serves as the work area for fabrication of the 3D object.
  • the build platform 1 15 moves downward in the Z direction between fabrication of individual layers by a distance substantially equal to the thickness of the layer, making room for the build material used for the next layer 130.
  • the system 100 includes two different sources of heat energy: a fusing lamp 140 and a heating lamp array 150.
  • the fusing lamp 140 may be mounted on a movable carriage along with the fusing agent print engine 160, where the carriage traverses the span of the build bed 120 in the X direction during fabrication of a layer.
  • the print engine 160 selectively deposits drops 162 of the fusing agent onto the appropriate X and Y locations of the layer 130 as the carriage traverses the build bed 120.
  • the fusing lamp 140 radiates heat energy 142 onto the layer 130 as the carriage traverses the build bed 120.
  • the fusing lamp 140 is a single lamp with a rated power of 1500 watts.
  • the fusing lamp 140 operates at its rated power throughout a fusing operation for a layer.
  • One or both of the print engine 160 and the fusing lamp 140 may operate during a given traversal of the carriage, and the carriage may traverse the build bed 120 one or more times during fabrication of a layer.
  • the desired variation in temperature to be achieved in the build bed 120 is less than 4 degrees C between any two points of the bed 120.
  • the power level of each of the lamps in the lamp array 150 is individually controllable such that different amounts of power may be applied to different ones of the lamps.
  • Another function of the lamp array 150 is to assist the fusing lamp 140 in certain situations with fusing the build material.
  • the 3D slice being fabricated may have a higher density of 3D part structure (i.e. build material to be fused) at one side of the build bed in the Y direction than at the other side, and the single fusing lamp 140 may be unable to fully fuse the denser portion of the structure.
  • each lamp in the lamp array 150 has a rated full power that is sufficient to assist with fusing the build material when needed.
  • each of the lamps in the lamp array 150 has a 300 watt to 400 watt full power rating.
  • the system 100 includes a controller 170.
  • the controller 170 is coupled to each of the lamps in the lamp array 150 to operate each lamp at a specified power level for that lamp.
  • the controller 170 is also coupled to at least one temperature detector or sensor which measures the temperature of different regions or zones of the build bed 120 and determines the power level to be specified for each lamp.
  • the controller 170 also accesses data for the 3D slice and determines the power level to be specified for each lamp if and when that lamp is to assist with fusing the build material.
  • the lamp array 150 is depicted looking up from the build bed 120 into the lamp array 150.
  • the lamp array 150 includes plural individual lamps 210.
  • the individual lamps 210 may be positioned in the lamp array 150 in locations that can achieve optimal uniform heating of the build bed 120. In some examples all the lamps 210 may have the same rated power, while in other examples the rated power may differ among different lamps 210.
  • the lamp array 150 is organized into zones 220 (indicated by dashed lines).
  • the lamp array 150 has ten zones 220.
  • Each lamp 210 is associated with a heating zone 220.
  • the number of lamps 210 in a zone 220 may vary, as may the size of a zone 220 in the x-y plane.
  • a zone 220 corresponds to a region of the build bed 120 in the x-y plane.
  • the AM system 100 includes at least one sensor to detect the temperatures of plural regions of the build bed 120.
  • a temperature is measured for each region of the build bed 120, and the measured temperature for a region determines, at least in part, the power level of the lamps 210 in the zone 220 corresponding to that region.
  • the lamps 210 in a zone 220 may be set to the same power level or different power levels.
  • Temperature may be measured using at least one temperature detector or sensor which collectively detects the temperature of the plural regions of the build bed.
  • a temperature sensor 230 such as for example an infrared camera, may be disposed in the lamp array 200, or at another location in the system 100.
  • plural temperature sensors for measuring the temperature at the regions of the build bed 120 corresponding to the zones 220 may be disposed in the build platform 1 15 or elsewhere in the system 100.
  • the system 300 includes a heating lamp array 310.
  • the system 300 may be or include the system 100 (FIG. 1 ) and the heating lamp array 310 may be or include the heating lamp array 150 (FIG. 1 ).
  • the heating lamp array 310 includes plural lamps 320, each of which may be one of the lamps 210 (FIG. 2).
  • each lamp 320 is coupled to a corresponding Triac-based control circuit 330 which controls the voltage applied to, and current flowing through, that lamp 320.
  • Each Triac- based control circuit 330 is in turn coupled to a lamp controller 340 which independently turns on the Triac of each Triac-based control circuit 330 at a specific time during a half-cycle of an AC waveform.
  • the controller 340 operates the lamp 320 coupled to that Triac-based control circuit 330 at a requested power level 350 for that lamp 320.
  • Each lamp 320 may be operated at a different requested power level 350.
  • the requested power level that is specified for a lamp 320 is a percentage from 0% to 100% of a rated full power of the lamp 320.
  • the requested power level 350 is determined using temperature data 375 obtained from at least one temperature detector 370.
  • a processor 380 computes the requested power level 350 for each lamp 320 and sends the requested power level to the controller 340. Different ones of the plural regions of the build bed can have different detected temperatures, and the requested power level for each lamp may be chosen to reduce temperature differences among the plural regions.
  • the requested power level 350 is also determined using 3D object slice information 377 for the layer of the 3D object which is presently being fabricated.
  • the slice information 377 defines which feature(s), if any, of that slice of the 3D object are to be fabricated in a particular region of the build bed.
  • the requested power level of that lamp 320 is further chosen to supply a desired amount of fusing heat energy to that region.
  • the processor 380 and controller 340 are illustrated as separate elements in FIG. 3, in other examples they may be combined into a single processor or controller.
  • the controller 170 may include the lamp controller 340 and/or the processor 380.
  • the lamp controller 340 is illustrated with a single one of the lamps 320 and Triac-based control circuits 330 of FIG. 3.
  • the Triac-based control circuit 330 is electrically coupled to the lamp 320 and an AC (alternating current) power source 410.
  • the Triac-based control circuit 330 includes a Triac 420, a voltage detector 430, and a current detector 440.
  • the circuit 330 connects the AC power source 410, the main terminals M1 and M2 of the Triac 420, the lamp 320, and the current detector 440 in series.
  • the voltage detector 430 is connected in parallel with the lamp 320 to measure the voltage across the lamp 320.
  • the voltage detector 430 and the current detector 440 are also electrically coupled to the lamp controller 340.
  • the Triac 420 acts as a switch to control whether, and when, alternating current from the AC power source 410 flows through the lamp to illuminate it and generate heat energy.
  • a turn-on signal 425 received at the gate input G of the Triac 420 will turn on (or “trigger") the Triac 420 and allow it to conduct. This allows the current to flow through the lamp and the current measurement circuit 440.
  • the Triac 420 automatically turns off at the end (zero crossing) of each half-cycle of AC power provided by the AC source 410.
  • a zero crossing detector 450 connected in parallel with the AC source 410 provides a zero crossing signal 455 to the lamp controller 340 at the end of each half-cycle.
  • the voltage detector 430 measures an instantaneous voltage Vinst 435 across the lamp 320
  • the current detector 440 measures an instantaneous current linst 445 through the lamp 320.
  • the instantaneous voltage Vinst 435 and the instantaneous current linst 445 are provided to the lamp controller 340.
  • the controller 340 triggers the measurements made by the voltage detector 430 and the current detector 440.
  • the lamp controller 340 uses the instantaneous voltage Vinst 435 and the instantaneous current linst 445 measured when the Triac 420 is conducting during a current half-cycle of AC power from the AC source 410, along with the requested power level 350, to compute a turn-on time of the Triac 420 for the next half-cycle.
  • the turn-on time is relative to the start of the next cycle.
  • the lamp controller 340 uses the zero crossing signal 455 to detect the start of the next half-cycle, and then turns on the Triac 420 at the turn-on time during that next half-cycle.
  • the lamp controller 340 can maintain the current in the lamp 320 below the lamp's rated full-power current when operating at any value of requested power between 0% and 100%.
  • the rated full-power (1 00% power) current corresponds to the current through the lamp when the filament is hottest, and thus the lamp resistance highest.
  • the lamp controller 340 allows the lamp 320 to be operated for long periods of time (or even continuously) at low power levels. The computation of the turn-on time to accomplish this is discussed subsequently in greater detail.
  • the AC source 410 generates a high-quality AC waveform. In other examples, such as for example in some industrial operating environments, the AC source 410 may be of lower quality. In some examples, the AC source 410 may be the AC mains of the facility in which the additive manufacturing system is installed. In some examples, the same AC source 410 is connected in parallel to all the lamps 320. The AC source 410 is of a sufficient power rating to supply current to all of the lamps 320 simultaneously during operation. [0039] In some examples, the Triac 420 has a rated voltage which is above the AC voltage generated by the AC source 410 and the operating voltage of the lamp 320, and a rated power which is above the rated power of the lamp 320..
  • the lamp 320 is a tungsten-halogen lamp having a temperature-dependent resistance. Lamps which are suitable to achieve a uniform temperature throughout the build bed emit energy at wavelengths which appropriate for heating the build material, and their energy output responds sufficiently rapidly to changes in the electrical power applied to the lamp. In some examples, the lamp 320 emits energy at wavelengths in the range of 800 to 1200 nanometers, and responds within 10 milliseconds to a change in electrical power of 10%.
  • the voltage detector 430 is a voltage
  • the voltage detector 430 may be a separate element from the lamp controller 340, or may be implemented in whole or in part within the lamp controller 340.
  • the current detector 440 is a current
  • the current detector 440 converts the current value into a proportional voltage which is then measured with a 10-bit A/D converter.
  • each half cycle 502, 504 is 1 0 milliseconds.
  • the Triac 420 automatically turns off (i.e. stops conducting current) at each zero-crossing point (TO, T2, and T4).
  • the Triac 420 is turned on (i.e. conducts current) by the turn-on signal 425 applied by the lamp controller 340 to the gate input of the Triac 420. Accordingly, the Triac 420 is conducting current (indicated by the shaded areas) during an end portion 512 of half-cycle 502 from time T1 to time T2, and again during an end portion 514 of half-cycle 504 from time T3 to time T4. Accordingly, the lamp is on (i.e. illuminated and emitting heat energy) during the end portions 512, 514.
  • a method 600 computes for the lamp, using the power level and instantaneous voltage and current of the lamp while illuminated during a present half-cycle of AC power applied to the lamp, a turn-on time of the corresponding Triac for a next half-cycle.
  • the method 600 begins at 610 by measuring the instantaneous voltage (Vinst) and current (linst) of the lamp while the Triac is conducting during a present half-cycle 502 of AC power.
  • the instantaneous voltage and current are measured during an end portion, such as end portion 512.
  • the instantaneous voltage and current are measured during the end portion within ⁇ n> milliseconds after the Triac has been turned on.
  • the instantaneous voltage and current may be measured by a voltage detector 430 and a current detector 440 (FIG. 4) respectively.
  • the Triac automatically turns off at time T2 (the end of half-cycle 502).
  • the Triac is turned on at the computed turn-on time (time T3) by the application of an appropriate turn-on signal issued by the lamp controller to the gate of the Triac.
  • a method 700 begins at 710 by turning on the Triac during an initial half-cycle of an AC waveform at a turn-on time determined based on a specified power level and a resistance of the lamp at a cold temperature.
  • the initial half-cycle may be, for example, the first cycle during which an AC waveform from an AC source (such as AC source 410, FIG. 4) is applied to a heating lamp array 150 (FIG. 1 )
  • the instantaneous voltage (Vinst) across, and current (linst) through, the lamp is measured during an end portion of a present half-cycle of an AC waveform (such as, for example, from an AC power source) which is applied to the lamp.
  • the AC waveform is applied to the lamp when the Triac which is connected in series with the AC power source and the lamp to control the lamp's illumination is conducting.
  • multiple measurements of the instantaneous voltage and/or current may be taken during the end portion of the present half-cycle, and the measurements averaged to form Vinst and/or linst.
  • a turn-on time of the Triac (Tturnon) for a next half-cycle of the AC waveform is computed based on the specified power level
  • the specified power level is a percentage of the rated power of the lamp.
  • the Triac turn-on time for the next half-cycle is then calculated from the adjusted power level and the instantaneous resistance.
  • a commutation time (Tcommutation) is determined as a function of Padjusted.
  • the commutation time is the duration of time at the end portion of the half-cycle during which the Triac is turned on and conducting.
  • the turn-on time (Tturnon) is then computed by subtracting Tcommutation from the period of a half-cycle.
  • the commutation time is determined at 744 according to a sinusoidal AC waveform, which may be an ideal sine wave.
  • a sinusoidal AC waveform which may be an ideal sine wave.
  • the Triac is turned on at the turn-on time (Tturnon; 7.5 msec in the preceding example) during the next half-cycle.
  • the method 700 continues at 720 to repeat the process using the next half-cycle of 760 as the present half-cycle of 720.
  • the turn-on time (Tturnon) for the initial half-cycle is computed in an analogous manner to block 740, substituting a specified value for the resistance of the lamp at a cold filament temperature (Rcold) for Rinst in the calculation of adjusted power which is performed at 742.
  • Rcold Rhot / 15.
  • a lamp controller 800 includes a computer-readable storage medium 820, which may be a memory, having processor-readable and/or processor- executable instructions stored thereon, such as the firmware or software instructions, including instructions to perform at least some portions of the method 600 (FIG. 6) and/or method 700 (FIG. 7).
  • the medium 820 is communicatively coupled to a processor 810 to access and execute the instructions.
  • the storage medium may include different forms of memory including semiconductor memory devices such as DRAM, or SRAM, Erasable and Programmable Read-Only Memories (EPROMs), Electrically Erasable and Programmable Read-Only Memories (EEPROMs) and flash memories; magnetic disks such as fixed, floppy and removable disks; other magnetic media including tape; optical media such as Compact Disks (CDs) or Digital Versatile Disks (DVDs); and/or other types of computer-readable storage devices.
  • the controller 170 (FIG. 1 ) or 340 (FIGS. 3-4) may be, or include, the controller 800.
  • the storage medium 820 includes a module and/or set of instructions 830 to measure Vinst and linst.
  • the storage medium 820 also includes a module and/or set of instructions 840 to compute the Triac turn-on time.
  • the storage medium 820 further includes a module and/or set of instructions 850 to control turn-on of the Triac, which in some examples also includes a module and/or set of instructions 855 to detect zero crossing of an AC waveform.
  • the instructions of the firmware and/or software discussed above can be provided on one computer-readable or computer-usable storage medium, or alternatively, can be provided on multiple computer- readable or computer-usable storage media distributed in a large system having possibly plural nodes.
  • Such computer-readable or computer-usable storage medium or media is (are) considered to be part of an article (or article of manufacture).
  • An article or article of manufacture can refer to any manufactured single component or multiple components.
  • At least one block discussed herein is automated.
  • apparatus, systems, and methods occur automatically.
  • automated or “automatically” (and like variations thereof) shall be broadly understood to mean controlled operation of an apparatus, system, and/or process using computers and/or mechanical/electrical devices without the necessity of human intervention, observation, effort and/or decision.
  • blocks in diagrams or numbers should not be construed as operations that proceed in a particular order. Additional blocks/operations may be added, some blocks/operations removed, or the order of the blocks/operations altered and still be within the scope of the disclosed examples. Further, methods or operations discussed within different figures can be added to or exchanged with methods or operations in other figures. Further yet, specific numerical data values (such as specific quantities, numbers, categories, etc.) or other specific information should be interpreted as illustrative for discussing the examples. Such specific

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  • Control Of Resistance Heating (AREA)

Abstract

Dans un exemple, l'invention concerne un système de commande pour une lampe. Un dispositif de commande est destiné à calculer un instant d'activation d'un triac pour un demi-cycle de courant alternatif suivant en utilisant un niveau de puissance de lampe spécifié et une tension et un courant instantanés de la lampe pour un demi-cycle actuel, et à activer le triac à l'instant d'activation pendant le demi-cycle suivant.
PCT/US2017/029432 2017-04-25 2017-04-25 Lampe et commande de triac Ceased WO2018199934A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2017/029432 WO2018199934A1 (fr) 2017-04-25 2017-04-25 Lampe et commande de triac

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2017/029432 WO2018199934A1 (fr) 2017-04-25 2017-04-25 Lampe et commande de triac

Publications (1)

Publication Number Publication Date
WO2018199934A1 true WO2018199934A1 (fr) 2018-11-01

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PCT/US2017/029432 Ceased WO2018199934A1 (fr) 2017-04-25 2017-04-25 Lampe et commande de triac

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675578A (en) * 1985-09-23 1987-06-23 Brighter Light Liturgical Furnishings, Inc. Electric votive light controller
RU2262216C1 (ru) * 2004-04-23 2005-10-10 Алексей Владимирович Бугрин Устройство для дистанционного регулирования мощности ламп накаливания
US8680771B2 (en) * 2009-04-30 2014-03-25 Cirrus Logic, Inc. Controller customization system with phase cut angle communication customization data encoding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675578A (en) * 1985-09-23 1987-06-23 Brighter Light Liturgical Furnishings, Inc. Electric votive light controller
RU2262216C1 (ru) * 2004-04-23 2005-10-10 Алексей Владимирович Бугрин Устройство для дистанционного регулирования мощности ламп накаливания
US8680771B2 (en) * 2009-04-30 2014-03-25 Cirrus Logic, Inc. Controller customization system with phase cut angle communication customization data encoding

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